update-release

#!/usr/bin/env bash

# Print error into STDERR
error() {
    echo "$@" 1>&2
}

# Get latest release for a GitHub repository
get_latest_release() {
    local repository=$1
    local url="https://api.github.com/repos/${repository}/releases/latest"
    if test "$(uname)" = "Darwin"; then
        curl --silent "${url}" |
            grep '"tag_name":' |
            sed -E 's/.*"([^"]+)".*/\1/'
    else
        curl --silent "${url}" |
            grep '"tag_name":' |
            sed -r 's/.*"([^"]+)".*/\1/'
    fi
}

# Get checksum for the install.sh script
get_install_checksum() {
    local repository=nvm-sh/nvm
    local release=$1
    local url="https://raw.githubusercontent.com/${repository}/${release}"
    url="${url}/install.sh"
    curl --silent "${url}" | sha256sum | awk '{ print $1 }'
}

# Update version
update_version() {
    local release=$1
    local checksum=""
    checksum=$(get_install_checksum "${release}")
    [ -z "${checksum}" ] && {
        error "Failed to get checksum for ${release}"
        return 1
    }
    update_ansible_vars "${release}" "${checksum}"
}

# Update nvm_version and nvm_install_checksum variables in defaults/main.yml
update_ansible_vars() {
    local version=$1
    local checksum=$2
    local vars_file=defaults/main.yml

    # Update variables
    echo "Updating variables in ${vars_file}"
    if test "$(uname)" = "Darwin"; then
        sed -i.save \
            -E "s/^(nvm_version):.*$/\1: \"${version}\"/" \
            ${vars_file}
        sed -i.save \
            -E "s/^(nvm_install_checksum):.*$/\1: \"sha256:${checksum}\"/" \
            ${vars_file}
    else
        sed -i.save \
            -r "s/^(nvm_version):.*$/\1: \"${version}\"/" \
            ${vars_file}
        sed -i.save \
            -r "s/^(nvm_install_checksum):.*$/\1: \"sha256:${checksum}\"/" \
            ${vars_file}
    fi
    rm ${vars_file}.save
}

# Get latest NVM version
latest_nvm_version() {
    local latest_release=""
    latest_release=$(get_latest_release nvm-sh/nvm)
    [ -z "${latest_release}" ] && {
        error "Failed to get latest release from GitHub"
        return 1
    }
    echo "${latest_release}"
}

# Update NVN version to the latest release
update_nvm_release() {
    local nvm_version
    nvm_version=$(latest_nvm_version)
    echo "Latest NVM release is ${nvm_version}"
    update_version "${nvm_version}"
}

set -e

update_nvm_release